Well give me time to get some information back from iFixit. I've looked up high-res images of the camera for the iPhone 4 and the camera for the iPad 2 and the only small problem I'm seeing (without having to open my iPad 2 or buy an iPhone 4 replacement camera) is that the ribbon connectors are on opposite sides. I will show you:

If you take a look at the two cameras (in post #16) there are significant differences between the number of pins in each connector. I'd say trying to adapt the camera from the iPhone 4 to the iPad 2 would not be an easy task, you would have to match up the pin-outs of the camera modules. It is also unlikely the iPad has a compatible interface chip on the main board that will match up to the horizontal and vertical grid that the new camera would provide even if the connectors were the same size.

Even if you can get a better camera into the iPad you still would be limited in capabilities. No flash and optical zoom on a $500 iDevice kinda makes a $99 12Mega pixel cameras look a little more appealing. Using the Camera Connection kit you can plug a usb cable or SD card into the 30 pin port and it works great. Using the iPad screen and the faster processors the images scale and rotate with very little delay.

New to the forum! Just wanted to pass on my experience with Opening up the ipad2. The day came when my ipad2 met the pavement and the glass shattered. So I decided to tackle the problem myself. I ordered a new digitizer screen, all the tools and studied videos on you tube for a while. iPad 1 is definitely easier to take apart than 2G iPad. The 2 has plenty of 3m super sticky strips to hold the screen while the 1 has proprietary screws. So there is definitely an over 50/50 probability of cracking your screen while doing the theoretical replacement of the ipad2 camera. There is also a chance to damage the antenna for wifi reception and several other sensitive elements. It's a bit like diffusing a bomb . ... Lol

After i replaced the screen and put the ipad back together again, the home button was not properly functioning.To cut a long story short it took me over
six hours to complete the operation and have everything working normally. The
Process of simply prying the screen apart from the super glued strips was a nightmare.

I am an avid photographer and would love a high quality camera in my iPad, however, just the thought of opening up the unit again is enough to send me running in the opposite direction. Well, thats's my 2 cents for what it's worth.

New to the forum! Just wanted to pass on my experience with Opening up the ipad2. The day came when my ipad2 met the pavement and the glass shattered. So I decided to tackle the problem myself. I ordered a new digitizer screen, all the tools and studied videos on you tube for a while. iPad 1 is definitely easier to take apart than 2G iPad. The 2 has plenty of 3m super sticky strips to hold the screen while the 1 has proprietary screws. So there is definitely an over 50/50 probability of cracking your screen while doing the theoretical replacement of the ipad2 camera. There is also a chance to damage the antenna for wifi reception and several other sensitive elements. It's a bit like diffusing a bomb . ... Lol

After i replaced the screen and put the ipad back together again, the home button was not properly functioning.To cut a long story short it took me over
six hours to complete the operation and have everything working normally. The
Process of simply prying the screen apart from the super glued strips was a nightmare.

I am an avid photographer and would love a high quality camera in my iPad, however, just the thought of opening up the unit again is enough to send me running in the opposite direction. Well, thats's my 2 cents for what it's worth.

Thanks for sharing that, and welcome to the Forums.

I've always wanted to be smart, handsome and modest. But, I guess I'll have to be satisfied with two out of three . . .